Turkish Customs applies a new HS code that increases import duty. Learn how businesses can challenge tariff reclassification, additional duties and penalties, protect historical imports and obtain classification certainty for future shipments.

A change in the tariff classification of imported goods can dramatically increase the cost of doing business in Turkey.

A product previously imported under one HS code may suddenly be classified by Turkish Customs under another tariff position carrying:

• Higher customs duty;
• Additional customs duty;
• Anti-dumping duty;
• Different import VAT consequences;
• Product-safety requirements;
• Import restrictions;
• Administrative penalties.

Turkey’s tariff system uses a 12-digit Customs Tariff Statistics Position. The first six digits correspond to the international Harmonized System, followed by Combined Nomenclature and Turkish national/statistical subdivisions.

The problem is particularly important in 2026 because Turkey has introduced both annual and mid-year tariff adjustments. The Ministry of Trade confirmed that the 2026 Import Regime incorporated changes to tariff positions and product descriptions, while additional amendments published in July 2026 reorganized statistical positions for numerous products.

A business facing a higher duty because of a new classification should therefore determine immediately:

Has the legislation actually changed?

Has Customs merely changed its interpretation of an unchanged product?

Has the product itself changed?

Does the new classification apply only prospectively or is Customs also assessing historical imports?

These questions lead to very different legal strategies.

1. Identify Why the HS Code Changed

Do not assume that every new tariff classification has the same legal basis.

The change may result from:

• Amendment of the tariff schedule;
• New classification decision;
• Customs reclassification during inspection;
• Post-clearance audit;
• Laboratory analysis;
• Different interpretation by another customs office;
• Correction of a historical classification error.

The first task is to identify the legal source of the change.

2. Distinguish a Legislative Change From Customs Reclassification

This distinction is critical.

Legislative change

The applicable tariff legislation itself changes.

Administrative reclassification

The legislation remains substantially the same, but Customs decides that the product should have been classified differently.

A company challenging the second situation may have significantly different arguments from a company affected by a prospective legislative amendment.

3. Determine the Effective Date

Identify:

• Publication date;
• Effective date;
• Import date;
• Declaration date;
• Release date.

A new tariff measure should not simply be assumed to apply to every historical import.

The relevant legal regime must be determined for each declaration.

4. Check the 2026 Turkish Tariff Schedule

The Ministry’s current customs legislation resources identify the 2026 Turkish Customs Tariff Schedule as the schedule published on December 30, 2025.

Businesses should compare:

2025 classification

with

2026 classification

and any subsequent amendments.

5. Mid-Year 2026 Changes Must Also Be Reviewed

Annual tariff schedules are not necessarily the end of the analysis.

In July 2026, the Ministry announced further Import Regime amendments and stated that statistical positions for numerous products had been reorganized.

Therefore, the company must determine exactly which tariff version applied on the relevant import date.

6. Compare the Old and New Codes

Prepare a technical table:

Issue	Old Classification	New Classification
HS/GTIP	Code A	Code B
Product description	Description A	Description B
Customs duty	Rate A	Rate B
Additional duty	Position A	Position B
Anti-dumping	Position A	Position B
Regulatory controls	Position A	Position B

This reveals the actual financial and regulatory consequences.

7. Determine Whether the Product Changed

Customs may argue that the new classification reflects changes to:

• Composition;
• Material;
• Function;
• Design;
• Model;
• Manufacturing method.

Compare historical and current product specifications carefully.

8. Obtain the Complete Technical File

Collect:

• Manufacturer specifications;
• Technical drawings;
• Catalogues;
• Composition information;
• User manuals;
• Photographs;
• Product samples where appropriate.

A classification dispute cannot usually be resolved through commercial product names alone.

9. Challenge Customs’ Technical Assumptions

Suppose Customs moves the product from a low-duty machinery heading to a higher-duty parts heading.

Ask:

Why?

The company’s challenge should identify the precise technical or legal error in Customs’ reasoning.

10. Review Section and Chapter Notes

Tariff classification should not be based merely on comparing product descriptions.

The applicable analysis may require:

• General classification rules;
• Section notes;
• Chapter notes;
• Tariff wording;
• Explanatory materials;
• Classification decisions.

The Ministry maintains current tariff explanatory materials and classification-decision communiqués, including materials listed in its tariff legislation resources updated in May 2026.

11. Previous Classification Can Be Important Evidence

If identical goods were historically imported under the old classification, preserve:

• Declarations;
• Inspection records;
• Customs correspondence;
• Laboratory reports.

Previous acceptance does not necessarily prevent Customs from correcting an incorrect classification, but it may be important to the dispute.

12. Previous Physical Inspection Is Particularly Relevant

If Customs previously physically examined identical goods and accepted the old code, obtain the inspection record.

This can support the argument that the company did not conceal the nature of the goods.

13. Laboratory Evidence Should Be Examined

Where the new classification is based on laboratory analysis, review:

• Sample identity;
• Sampling procedure;
• Test methodology;
• Product batch;
• Laboratory findings.

A technical finding should also be distinguished from the ultimate legal tariff classification.

14. Check Existing Binding Tariff Information

Determine whether the company already holds valid Binding Tariff Information concerning the product.

BTI is a formal administrative decision concerning classification under the Turkish Customs Tariff Schedule.

An applicable BTI can materially change the company’s position.

15. Consider Binding Tariff Information for Future Imports

If classification uncertainty continues, obtaining BTI may provide greater prospective certainty.

Applications can be made electronically or through authorized regional customs authorities and require a detailed description of the goods and supporting classification materials.

16. Do Not Confuse HS Classification With the Duty Rate

Determining the correct tariff position is only the first stage.

After identifying the code, separately determine:

• Customs duty;
• Additional customs duty;
• Anti-dumping measures;
• Preferential treatment;
• Other trade-policy measures.

The Ministry itself notes that after tariff classification is determined, the applicable tax rates and foreign-trade measures must be identified separately.

17. Additional Customs Duty Can Be the Main Financial Risk

A classification change may move the goods into a tariff position subject to additional customs duty.

Turkey’s current consolidated additional-customs-duty framework identifies applicable rates by GTIP and also contains specific rules concerning origin and preferential treatment.

The company’s analysis must therefore consider both classification and origin.

18. Check Whether Preferential Origin Changes the Result

A higher nominal duty does not always mean the company must pay the highest possible amount.

Review:

• Country of origin;
• Free trade agreement;
• Preferential origin documentation;
• Customs Union treatment where applicable.

The classification and origin analyses should be coordinated.

19. Anti-Dumping Exposure Can Transform the Case

A tariff change can sometimes place a product within a position associated with an anti-dumping measure.

If so, verify:

• Product description;
• Origin;
• Producer;
• Exporter;
• Relevant measure;
• Effective period.

Do not assume that the tariff code alone proves that anti-dumping duty applies.

20. Calculate the Real Increase

Prepare a shipment-level calculation.

For example:

Old customs burden: TRY 500,000

New classification: TRY 1,400,000

Difference: TRY 900,000.

Then include potential:

• Additional duties;
• Penalties;
• Late-payment amounts;
• Storage costs.

This determines the commercial importance of the challenge.

21. Historical Imports Require Separate Analysis

A company may accept the new classification prospectively but dispute its application to older declarations.

Do not automatically assume:

New code today = wrong code three years ago.

Historical legislation and historical product characteristics must be reviewed.

22. Build a Declaration-by-Declaration Timeline

For each historical import, record:

Declaration date

Tariff code

Product

Customs value

Duty paid

New duty claimed

Penalty

Notification date.

This is essential where Customs expands the issue into a post-clearance review.

23. Check Limitation Issues

If Customs seeks additional duties for historical imports, review whether each assessment remains timely under the applicable customs framework.

The analysis should be declaration-specific.

Do not assume that a current tariff change automatically reopens all historical transactions.

24. Challenge the Additional Assessment Promptly

Where Customs issues a formal assessment based on the new classification, identify the notification date immediately.

The administrative challenge procedure under Customs Law Article 242 is deadline-sensitive.

Commercial negotiations with the supplier, broker or customs office should not be allowed to consume the legal challenge period.

25. Challenge the Penalty Separately

A new classification may generate:

additional duty

and

administrative penalty.

The penalty should be independently examined.

The company may argue:

Primary position: The historical classification was legally correct.

Alternative position: Even if the new classification is accepted, the penalty lacks the asserted legal basis or has been incorrectly calculated.

26. A Genuine Classification Dispute Is Different From False Description

There is an important factual difference between:

accurately described goods classified under a disputed heading

and

goods deliberately described inaccurately to obtain a lower duty.

The company’s documentation should make this distinction clear where appropriate.

27. Preserve Evidence of Good-Faith Classification

Collect:

• Broker advice;
• Supplier classification;
• Technical opinions;
• Previous customs inspections;
• Previous laboratory reports;
• BTI;
• Internal classification memoranda.

These materials can become important in penalty disputes.

28. Supplier Responsibility Should Be Reviewed

If a foreign supplier expressly guaranteed an HS classification that later proves incorrect, examine the supply contract.

Potential recovery may involve:

• Warranties;
• Indemnities;
• Incorrect technical representations.

This contractual claim is separate from the company’s relationship with Turkish Customs.

29. Customs Broker Responsibility May Also Arise

If the broker independently selected the historical classification, preserve:

• Instructions;
• Emails;
• Technical documents provided;
• Classification advice.

A professional-liability claim may need to be considered separately.

30. Do Not Allow Supplier and Broker Disputes to Delay Customs Action

The company should protect its customs challenge first.

Whether the supplier or broker ultimately reimburses the loss can be addressed simultaneously under the relevant contracts.

31. Existing Purchase Contracts Should Be Reviewed

A sudden duty increase may affect long-term supply contracts.

Review:

• Price clauses;
• Customs-duty clauses;
• Tax clauses;
• Change-in-law provisions;
• Hardship clauses;
• Termination rights.

The company may be able to renegotiate the commercial allocation of the increased cost.

32. Incoterms Should Be Checked

The agreed delivery term can affect which party commercially bears import costs.

But Incoterms should not automatically be treated as resolving every public-law customs liability issue.

Read the full contract.

33. Fixed-Price Contracts Can Create Serious Margin Problems

A distributor may be unable to pass the new import cost to customers.

Calculate:

new landed cost

gross margin

existing customer commitments

termination exposure.

Customs strategy and commercial-contract strategy should therefore be coordinated.

34. Tariff Quotas and Other Relief Should Be Investigated

A higher standard duty may not always represent the final effective cost.

The Ministry’s 2026 Import Regime included tariff quotas for certain industrial products where domestic production did not sufficiently meet input needs.

Businesses should determine whether any applicable relief mechanism exists for their product.

35. Do Not Route Imports Through Another Customs Office Merely to Obtain the Old Code

If Customs has formally questioned the classification, changing ports to find an office that continues accepting the lower-duty code can create additional compliance risk.

Resolve the classification substantively.

36. Consider Security and Release Options

Where goods are currently held and classification remains disputed, assess whether available customs procedures permit release against appropriate security or another lawful mechanism.

This can be particularly important where storage charges are accumulating.

37. Quantify Business Interruption

If the tariff dispute delays clearance, document:

• Storage;
• Demurrage;
• Production interruption;
• Customer penalties;
• Lost sales.

These costs can quickly exceed the disputed duty.

38. Review All Similar Products

A classification change for one product may affect:

• Earlier models;
• Spare parts;
• Accessories;
• Related products.

Conduct a focused portfolio review before Customs expands the issue.

39. Correct Future Imports Where Necessary

If the legal and technical review establishes that the new classification is correct, future declarations should be updated.

Continuing a known incorrect classification can increase risk.

40. A Prospective Change Does Not Automatically Concede Historical Liability

A business can adopt a conservative classification for future imports while continuing to challenge the historical assessment.

Document the commercial and legal reasons for the prospective change.

41. Update Internal Customs Systems

If the classification changes, update:

• Product master data;
• Customs broker instructions;
• ERP records;
• Landed-cost calculations;
• Supplier documentation.

This prevents different brokers from using inconsistent codes.

42. Reprice Future Transactions

A permanent duty increase may require:

• Supplier renegotiation;
• Customer price adjustment;
• Alternative sourcing;
• Different product configuration.

Legal classification analysis should therefore feed directly into commercial planning.

43. Consider Alternative Sourcing Carefully

Changing the supplier or country of origin can alter the customs burden.

However, businesses should not use artificial routing or unsupported origin declarations merely to avoid higher duties.

Any restructuring must reflect genuine commercial and origin rules.

44. Use Two Separate Strategies

Where a new classification increases duty, businesses generally need:

Historical defense strategy:
Challenge reclassification, assessments and penalties concerning previous imports.

Future import strategy:
Establish the correct classification, obtain greater certainty where possible and adjust sourcing or pricing.

45. Immediate Action Plan for Businesses

The recommended sequence is:

Identify why the classification changed

→ determine the effective date

→ compare old and new tariff codes

→ verify product specifications

→ review current classification materials

→ check existing BTI

→ calculate the duty difference

→ review additional customs duty and anti-dumping exposure

→ identify historical declarations

→ record assessment notification dates

→ challenge reclassification and penalties where appropriate

→ consider BTI for future imports

→ review supplier and broker responsibility

→ review commercial contracts

→ update future customs compliance.

25-Point New HS Code Checklist

1. Identify the old tariff code.
2. Identify the new tariff code.
3. Determine why classification changed.
4. Determine the effective date.
5. Confirm the exact product.
6. Obtain technical specifications.
7. Compare historical specifications.
8. Review tariff wording.
9. Review section notes.
10. Review chapter notes.
11. Review classification decisions.
12. Check existing BTI.
13. Consider new BTI.
14. Calculate customs-duty difference.
15. Check additional customs duty.
16. Check anti-dumping measures.
17. Review origin.
18. Check preferential treatment.
19. Identify historical declarations.
20. Review limitation issues.
21. Record notification dates.
22. Challenge assessments promptly.
23. Challenge penalties separately.
24. Review supplier and broker liability.
25. Update future classification procedures.

Frequently Asked Questions

1. Can Turkey change the tariff classification of a product?

Yes. Classification treatment may change because of amendments to the tariff framework, new classification decisions or a Customs determination that the previous classification was incorrect. Turkey also made tariff-position adjustments during 2026.

2. Does a new HS code automatically apply to previous imports?

Not automatically. The legal regime, product characteristics and tariff rules applicable to each historical declaration should be examined separately.

3. Can a company challenge Customs’ new classification?

Yes. Where Customs issues an adverse assessment based on a disputed classification, the importer can use the applicable administrative and judicial challenge mechanisms. Technical evidence is often central to the dispute.

4. Can the importer challenge the penalty even if the new tariff classification is upheld?

Potentially. Additional duty and administrative penalty should be analyzed separately, including the statutory basis and calculation of the penalty.

5. Can Binding Tariff Information help?

Yes. BTI is a formal administrative classification decision and can provide greater certainty for qualifying future imports.

6. Can a higher HS code also trigger additional customs duty?

Yes. Additional customs duty is applied by reference to listed GTIPs and other conditions under the applicable regime. The current consolidated framework should be checked for the product and origin concerned.

7. Can the new classification trigger anti-dumping duty?

Potentially. But the exact trade-defense measure, product description, origin, producer and applicable period must also be examined.

8. Can the company recover the increased cost from its foreign supplier?

Possibly. The supply agreement should be reviewed for tariff warranties, customs-duty allocation, indemnities, change-in-law provisions and pricing clauses.

9. Should the company immediately use the new HS code for every future shipment?

The classification should first be reviewed technically and legally. If the new classification is confirmed as correct, future declarations should be updated accordingly.

10. What should a company do first when a new classification sharply increases import duty?

Identify whether the change results from new legislation or a new interpretation of existing rules. Then verify the correct classification, calculate the complete financial impact, protect the deadline for challenging any assessment and separately develop a compliant classification strategy for future imports.

Client-Focused Legal Support for HS Code and Import Duty Disputes in Turkey

Tariff changes can create disputes involving:

HS code reclassification

Higher customs duties

Additional customs duties

Anti-dumping measures

Historical customs assessments

Administrative penalties

Binding Tariff Information

Customs audits

and international supply contracts.

Fırat Fesih Kaya Law Office assists foreign-owned businesses, international manufacturers and importers when a new tariff classification substantially increases the cost of importing goods into Turkey.

Lawyer Fırat Fesih Kaya provides legal assistance in challenging tariff reclassification and additional assessments, reviewing historical import exposure, contesting customs penalties, evaluating Binding Tariff Information and coordinating customs disputes with supplier, broker and commercial-contract remedies.

Phone: +90 312 434 22 22
Mobile: +90 532 769 22 22
Email: info@firatfesihkaya.av.tr
Address: Mevlana Boulevard No:221, Yıldırım Tower, Office No:148, 06520 Balgat, Çankaya, Ankara, Turkey